Try using 32775 which is maximum bittage according to docs of Win32API::File 
perl -MWin32API::File -
die
Win32API::File::SEM_FAILCRITICALERRORS()
|Win32API::File::SEM_NOALIGNMENTFAULTEXCEPT()
|Win32API::File::SEM_NOGPFAULTERRORBOX()
|Win32API::File::SEM_NOOPENFILEERRORBOX()
__END__
32775 at - line 1.

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In reply to Re^3: open3 generates Windows Command Processor Has Stopped Working by Anonymous Monk
in thread open3 generates Windows Command Processor Has Stopped Working by DanEllison

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